/**
 * Copyright (c) 2012, Brent Mucci, Ken Anderson
 * All rights reserved.
 * 
  * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 **/

#ifndef _NAL_HPP
#define _NAL_HPP

#include "mcl_bitstream_buffer.hpp"
#include "mcl_nal_unit_header_mvc_extension.hpp"
#include <vector>

namespace mcl 
{

// A NAL (Network Abstraction Layer) unit 
class NAL
{
public:
	NAL();
	~NAL();

	// Parse out the next NAL unit from the bitstream.
	// If the size is known (if data is in a container), set it.
	// Otherwise (if data is being streamed), the size will be determined by 
	// scanning though the data until the end if found.
	// Return true if parsed.  Return false otherwise.
	bool parse(BitstreamBuffer &bitstream, const int numBytes );

	// *** See ITU-T June 2011 specification on the following variables:
	unsigned char m_forbidden_zero_bit;
	unsigned char m_nal_ref_idc;
	unsigned char m_nal_unit_type;
	unsigned char m_svc_extension_flag;
	unsigned int  m_numBytesInNALunit;
	std::vector<char> m_rbsp_bytes;
	MVCHeader     m_mvc_header;
};

};

#endif